JPH0631812B

JPH0631812B

PURPOSE:To prevent damage to a recirculation pump of a boiling water reactor, by making other pumps to be run back automatically in case one recirculation pump trips down. CONSTITUTION:A tripping of a recirculation pump 5a driven by a motor 4a is detected from an on-off situation of an input breaker...

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Hauptverfasser: OOTSUKA SHIRO, YAMADA MINORU
Format: Patent
Sprache:eng
Schlagworte:
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR POWER PLANT
NUCLEAR REACTORS
PHYSICS
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creator OOTSUKA SHIRO
YAMADA MINORU
description PURPOSE:To prevent damage to a recirculation pump of a boiling water reactor, by making other pumps to be run back automatically in case one recirculation pump trips down. CONSTITUTION:A tripping of a recirculation pump 5a driven by a motor 4a is detected from an on-off situation of an input breaker 13a of a variable cycled power supply 9a. A monitoring circuit 1 memories a reactor output and a core flow characteristics of each pump and monitors whether an operation point of the recirculation pump 5 reaches a cavitation zone or not, based on a feed water signal 22, a core flow signal 23 and a trip signal 12a from a trip detection circuit 12. An interlock circuit 20, based upon an output of the monitoring circuit 19, put out a runback direction signal, switches a manual/auto switching contact 10 of a speed governor 31 to a manual side (b) and controls a speed of another recirculating pump 5b by a directing signal 39 of speed setting from a runback setter 31.
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CONSTITUTION:A tripping of a recirculation pump 5a driven by a motor 4a is detected from an on-off situation of an input breaker 13a of a variable cycled power supply 9a. A monitoring circuit 1 memories a reactor output and a core flow characteristics of each pump and monitors whether an operation point of the recirculation pump 5 reaches a cavitation zone or not, based on a feed water signal 22, a core flow signal 23 and a trip signal 12a from a trip detection circuit 12. An interlock circuit 20, based upon an output of the monitoring circuit 19, put out a runback direction signal, switches a manual/auto switching contact 10 of a speed governor 31 to a manual side (b) and controls a speed of another recirculating pump 5b by a directing signal 39 of speed setting from a runback setter 31.</description><edition>5</edition><language>eng</language><subject>NUCLEAR ENGINEERING ; NUCLEAR PHYSICS ; NUCLEAR POWER PLANT ; NUCLEAR REACTORS ; PHYSICS</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19940427&amp;DB=EPODOC&amp;CC=JP&amp;NR=H0631812B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19940427&amp;DB=EPODOC&amp;CC=JP&amp;NR=H0631812B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OOTSUKA SHIRO</creatorcontrib><creatorcontrib>YAMADA MINORU</creatorcontrib><title>JPH0631812B</title><description>PURPOSE:To prevent damage to a recirculation pump of a boiling water reactor, by making other pumps to be run back automatically in case one recirculation pump trips down. 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CONSTITUTION:A tripping of a recirculation pump 5a driven by a motor 4a is detected from an on-off situation of an input breaker 13a of a variable cycled power supply 9a. A monitoring circuit 1 memories a reactor output and a core flow characteristics of each pump and monitors whether an operation point of the recirculation pump 5 reaches a cavitation zone or not, based on a feed water signal 22, a core flow signal 23 and a trip signal 12a from a trip detection circuit 12. An interlock circuit 20, based upon an output of the monitoring circuit 19, put out a runback direction signal, switches a manual/auto switching contact 10 of a speed governor 31 to a manual side (b) and controls a speed of another recirculating pump 5b by a directing signal 39 of speed setting from a runback setter 31.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR POWER PLANT
NUCLEAR REACTORS
PHYSICS
title JPH0631812B
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